Abstract: A hydraulic control circuit for, for example, working members of earth-moving machines such as backhoe loaders. A first and a second control section (9,10) are coupled to first and second linear hydraulic actuators (1,2; 3-8) through respective first a second hydraulic spool valves (21,22; 23-28), and supply (11) of a hydraulic fluid under pressure is connected in parallel with the two control sections (9,10) via a feed line (13). A load sensing circuit (16) is associated with the first and second spool valves. The control circuit includes a series-parallel connection circuit (36) of the load sensing circuit (16), and additional optional devices ensuring a higher operative functionality of the working members of the machine.